CMF / CRF Details
CMF ID: 1974
Changeable Curve Speed Warning signs
Description:
Prior Condition: prior
Category: Advanced technology and ITS
Study: An Evaluation of Dynamic Curve Warning Systems in the Sacramento River Canyon, Tribbet, L., McGowen, P., and Mounce, J., 2000
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 0 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 2 |
| Adjusted Standard Error: | 4 |
| Unadjusted Standard Error: | 3 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 0 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | 31 |
| Unadjusted Standard Error: | 2 |
| Applicability | |
|---|---|
| Crash Type: | Single vehicle,Speed related |
| Crash Severity: | |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
| Street Type: | |
| Minimum Number of Lanes: | 5 |
| Maximum Number of Lanes: | 5 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Undivided |
| Minimum Speed Limit: | 55 |
| Maximum Speed Limit: | 55 |
| Speed Unit: | mph |
| Speed Limit Comment: | |
| Area Type: | All |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | All |
| If countermeasure is intersection-based | |
| Intersection Type: | Roadway/bicycle path or trail |
| Intersection Geometry: | 4-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | Minimum of 2 to Maximum of 3 |
| Minor Road Traffic Volume: | Minimum of 4 to Maximum of 3 |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 1953 to 1977 |
| Municipality: | |
| State: | AK,AZ,AR,CA,CO,CT |
| Country: | |
| Type of Methodology Used: | Case-control |
| Sample Size (miles): | 3 miles |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 01, 2009 |
| Comments: | |
